u can go with stock internals with low boost...max 7-10psi to keep the engine from going soo quick...if you are looking to do any kind of bottom end replacement (rods, pistons, etc.), you are gonna need to do it with a fresh engine meaning you are going to have to go and have it machined to get rid of all the carbon and build up...but for 250whp...i dun think you will need to build the bottom...its really up 2 you tho bro...later man

Mezz